The underlay is totally dry now, its taken about a week! I'm going to jet wash the actual carpets this weekend. I thought the water was coming in down the inside of the door as there are two rusty holes at the bottom of the door. When I have the hose out I will test it. I've got a big canvas covering it up, although we've not had any rain here lately.
Yes we bought the car from Cardiff, how can you tell that from the reg number?
Although something strange happened last night, I was surfing the net and came across this site
http://www.chrisdoe.co.uk/fiat.htm. This guy's photo is the exact same photo my seller used on ebay, I've contacted him to see if it might be the same car or whether my seller just used his photo. The car in the photo was in Essex, not too far from me. Spooky!